The Web is still changing.

If you're an engineer, you should be able to solve it in (under) three minutes,
If you're an architect, in three hours;
If you're a doctor, in six hours;
If you're an accountant, in three months and
If you're a lawyer, probably never.

What is the missing number in this logical series?
1, 2, 6, 42, 1806, ___ ???

The answer is the password to open the spreadsheet that is attached to this email. If you figure it out, open the spreadsheet, type your name in, save it and resend it to your friends.

Year

Month

Day

About the author

Joon Kyoung(a.k.a Firejune) is a web front-end development journeyman,
and passionate about JavaScript. Sometimes he is a buster in interface design.
Making a better web place is his ongoing mission and he is currently working with the best engineers of the industry at RSUPPORT.
He loves coffee, cola and kimchi(what a fantastic combination?!). You can find him on Twitter @firejune or Blog.